Presentation on health hazards by em waves

health hazard

1. PRESENTATION ON HEALTH HAZARDS BY EM WAVES By Rajat soni MTECH Wct

2. Radiation Radiation is divided into two categories: Ionizing radiation Alpha particles, Beta particles, X rays, cosmic rays Non-ionizing radiation Light, including visible, Infra red and Ultra violet Radio waves from ULF to millimeter waves Also of interest 50-60 Hz fields from power lines and other sources

3. Electromagnetic Spectrum 10 -14 10 -12 10 -10 10 -8 10 -6 10 -4 10 -2 1 10 2 10 4 10 6 10 8 Wavelength in Meters 10 10 10 8 10 6 10 4 10 2 1 10 -2 10 -4 10 -6 10 -8 10 -10 10 -12 10 -14 Broadcast Short wave TV FM Radar Infrared Near Far Visible Ultraviolet X Rays Gamma Rays Cosmic Rays Power Transmission Ionizing Radiation Nonionizing Radiation Energy - Electron Volts High Low

4. Biological hazards the most common health hazard of radiation is that it could cause burns or even skin cancer biological effect of electromagnetic fields is to cause dielectric heating can cause severe burns. Electrical hazards Very strong radiation can induce current capable of delivering an electric shock. Extremely high power electromagnetic radiation can cause electric currents strong enough to create sparks. TYPES OF HAZARDS

5. EMR EFFECTS ON THE HUMAN BODY BY FREQUENCY Extremely-low-frequency High-power extremely-low-frequency RF are known to induce perceivable currents within the human body that create an annoying tingling sensation. Shortwave frequency Shortwave causes heating of human tissue only heats tissues that are good electrical conductors, such as blood vessels and muscle. Microwaves Exposure to high-power microwave RF is known to create effects ranging from a burning sensation on the skin and microwave auditory effect, to extreme pain at the mid-range, to physical microwave burns and blistering of skin and internals at high power levels.

6. Infrared Infrared can produce changes in the lens of the eye. Glassblower's cataract an example of a heat injury that damages the anterior lens capsule Visible Light Moderate and high-power lasers are potentially hazardous because they can burn the retina of the eye, or even the skin . Ultraviolet Short-term exposure to strong ultraviolet sunlight causes sunburn within hours of exposure . sun can lead to melanoma and other skin malignancies .

7. 50-60 Hz fields from power lines who came in contact with high voltage lines were more likely to contract Lou Gherig’s disease (ALS ) ALS = amyotrophic lateral sclerosis c ondition in which some nerves cease to conduct

8. Population Studies Look for: General decline in health Specific conditions E.g. cancer, digestive illnesses, sleeplessness Results of Russian study: People working in factories where exposure to radio waves and radar transmissions were less healthy than general population Problem: What other factors might be involved?

9. Safety Standards International standards set by World Health Organization (WHO) National Standards set by government departments or agencies and national (independent) bodies CDRH in US National Radiological Protection Board in UK Department of Post and Telecommunications in Japan

10. Thank you